Fitness trainers lead and instruct exercise groups in strength training, stretching, and cardiovascular exercises. In this career, you may work in facilities like health clubs, fitness centers, gyms, yoga or Pilates studios, or outdoors in local parks, depending on your specialization. Some trainers may conduct personal sessions in a client’s home or help in senior centers. Since you are working around work schedules, you typically have to work early mornings, evenings, and weekends. You can be self-employed or work for a company, sometimes paying fees to use fitness facilities or equipment.